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Finding the Fourth Proportional to 18,849.90, 28,275.78 and 7,164.02

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Solution

The fourth proportional to 18,849.90, 28,275.78 and 7,164.02 is: 10,746.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,849.90 : 28,275.78 = 7,164.02 : x
  2. Step 2: Convert to fraction form
    18,849.90/28,275.78 = 7,164.02/x
  3. Step 3: Cross multiply
    18,849.90x = 28,275.78 × 7,164.02
  4. Step 4: Simplify right side
    18,849.90x = 202,568,253.44
  5. Step 5: Solve for x
    x = 202,568,253.44/18,849.90
  6. Step 6: Final answer
    x = 10,746.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.